Hi, @giller198 -- interesting question about the phrenic nerve and a potential test to see if it works properly.

I found this information in Clinical Update, one of Mayo Clinic's newsletters for medical professionals. https://mayocl.in/2OIMrn9 You'll note it makes reference to phrenic nerve studies.

I also thought that @windwalker and @johnbishop may have something to add to this discussion about your inexplicable diaphragm paralysis and possibilities for testing the phrenic nerve.

You mentioned the pulmonologists you saw talked about a surgical procedure that can be done but is not guaranteed. What procedure were they looking at, if you don't mind sharing?